1. First check whether the power connection of the touch all-in-one machine is normal, whether the socket has power, and whether the power supply is in normal power supply state;
2. Disassemble the touch all-in-one machine and check whether the mainboard power interface is connected properly, whether the connection between other devices and the mainboard is loose, whether the baseboard or mainboard is powered on, and whether the ATX power supply is wired incorrectly;
4. If you unplug the memory bar and turn it on, whether it alarms;
5. Replace the CPU or motherboard.
